Netflix is already collecting a profile of every user based on what he chooses to watch. If users only watches violent series and movies, they will only get more violence in their recommendations.

Black Mirror isn't giving Netflix anything that they don't already have, but I agree that we should be worried with the overall scenario. The problem is that we aren't.

What happened with Facebook should have changed the way in which we see those big corporations that regularly register personal and behavioural data, but it didn't. Most still use Facebook, and they don't care.

It'll take much more for us to really worry.